Inspection Procedure

WARNING: This page is about a different car, the 2002 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.

Noise Check
PREPARATION: insert the already registered master key in the key cylinder.

CHECK: using an oscilloscope or TOYOTA hand-held tester, check that noise is included in the signals sent to the CODE terminal of ECM.

Fig 1: Graphing Noise During Transmission
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OK: no noise is detected.
1. NG: Try to find the cause of the noise and remove it.
2. OK: Go to step 2.
Does The System Operate Normally After Replacement Of Transponder Key Amplifier?
1. Yes: Replace transponder key amplifier.
2. No: Replace ECM.